Using new observations from NASA's Hubble Space Telescope and ground-based observatories, astronomers tracked the influence of a recently discovered companion star, Siwarha, on the gas around Betelgeuse.

Using new observations from NASA's Hubble Space Telescope and ground-based observatories, astronomers tracked the influence of a recently discovered companion star, Siwarha, on the gas around Betelgeuse.

Hubble discovered that supermassive black holes lurk at the hearts of most galaxies. But not all black holes are equal.

Hubble discovered that supermassive black holes lurk at the hearts of most galaxies.